# coding=utf-8
# 异常处理
import logging

from django.db import DatabaseError
from redis import RedisError
from rest_framework import status
from rest_framework.response import Response
from rest_framework.views import exception_handler as drf_exception_handler

logger = logging.getLogger("django")


def exception_handler (exc, context):
    """
    自定义异常处理
    :param exc: 异常
    :param context: 异常产生的上下文环境
    :return: 返回异常信息
    """
    # 调用drf框架原生的异常处理方法
    response = drf_exception_handler(exc, context)

    if response is None:
        # 获取产生异常的视图
        view = context["view"]
        if isinstance(exc, DatabaseError) or isinstance(exc, RedisError):
            logger.error('[%s] %s' % (view, exc))
            response = Response({'message': '服务器内部错误'}, status=status.HTTP_507_INSUFFICIENT_STORAGE)
    return response
